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Kannan Gothandapani

Bio: Kannan Gothandapani is an academic researcher from VIT University. The author has contributed to research in topics: Tafel equation & Electrocatalyst. The author has an hindex of 4, co-authored 9 publications receiving 53 citations.

Papers
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Journal ArticleDOI
21 Jul 2020
TL;DR: The present study reports the synthesis of a porous Fe-based MOF named MIL-100(Fe) by a modified hydrothermal method without the HF process, demonstrating as an excellent electrocatalyst for the hydrogen evolution reaction investigated in both acidic and alkaline media.
Abstract: The present study reports the synthesis of a porous Fe-based MOF named MIL-100(Fe) by a modified hydrothermal method without the HF process. The synthesis gave a high surface area with the specific surface area calculated to be 2551 m2 g-1 and a pore volume of 1.407 cm3 g-1 with an average pore size of 1.103 nm. The synthesized electrocatalyst having a high surface area is demonstrated as an excellent electrocatalyst for the hydrogen evolution reaction investigated in both acidic and alkaline media. As desired, the electrochemical results showed low Tafel slopes (53.59 and 56.65 mV dec-1), high exchange current densities (76.44 and 72.75 mA cm-2), low overpotentials (148.29 and 150.57 mV), and long-term stability in both media, respectively. The high activity is ascribed to the large surface area of the synthesized Fe-based metal-organic framework with porous nature.

52 citations

Journal ArticleDOI
TL;DR: In this article, a cuprous oxide encapsulated with graphitic carbon nitride was synthesized and further structural and morphological properties were analyzed by XRD, SEM and BET.

40 citations

Journal ArticleDOI
14 Sep 2020
TL;DR: Cu-based MOFs along with graphene oxide are synthesized and used further for reducing CO2 electrochemically and the results showed that HCOOH was the main product formed through reduction, which is carried out using a cost-effective catalyst for the conversion of CO2 to formic acid than using the commercial electrodes.
Abstract: A recent class of porous materials, viz., metal–organic frameworks (MOFs), finds applications in several areas. In this work, Cu-based MOFs (Cu–benzene-1,3,5-tricarboxylic acid) along with graphene...

34 citations

Journal ArticleDOI
TL;DR: In this paper, a simple method is utilized to improve the hydrogen evolution reaction (HER) activity by introducing Fe/Pt bimetallic nanoparticles supported on highly porous carbon (PC) viz. one step carbonization of Nano•MOF•5(Zn) as precursor (metal organic framework).
Abstract: The design of an efficient electrocatalyst with controlled morphology and structural characteristics remain a challenging task for advanced electrochemical hydrogen evolution reaction (HER). Herein a simple method is utilized to improve the HER activity by introducing Fe/Pt bimetallic nanoparticles supported on highly porous carbon (PC) viz. one step carbonization of Nano‐MOF‐5(Zn) as precursor (metal organic framework). The as prepared Nano MOF‐5(Zn), Fe/Pt−PC and PC derived from MOF were characterized by various techniques like X‐ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, BET (nitrogen adsorption/desorption isotherms) and Field emission scanning electron microscopy (FE‐SEM). The developed Fe−Pt/PC exhibits an optimal HER performance with low overpotential (85.4 mV) and a Tafel slope of 42.4 mV dec−1. The electrochemical results show that the developed material provides a viable approach for developing inexpensive Pt‐based catalyst for HER.

14 citations


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TL;DR: In this article , the authors discussed the preparation, modification, and physical properties of the g-C3N4 and then, they discussed the combination of g-c3n4 with various metal oxides such as TiO2, ZnO, FeO and Fe2O3.
Abstract: g-C3N4 has drawn lots of attention due to its photocatalytic activity, low-cost and facile synthesis, and interesting layered structure. However, to improve some of the properties of g-C3N4, such as photochemical stability, electrical band structure, and to decrease charge recombination rate, and towards effective light-harvesting, g-C3N4–metal oxide-based heterojunctions have been introduced. In this review, we initially discussed the preparation, modification, and physical properties of the g-C3N4 and then, we discussed the combination of g-C3N4 with various metal oxides such as TiO2, ZnO, FeO, Fe2O3, Fe3O4, WO3, SnO, SnO2, etc. We summarized some of their characteristic properties of these heterojunctions, their optical features, photocatalytic performance, and electrical band edge positions. This review covers recent advances, including applications in water splitting, CO2 reduction, and photodegradation of organic pollutants, sensors, bacterial disinfection, and supercapacitors. We show that metal oxides can improve the efficiency of the bare g-C3N4 to make the composites suitable for a wide range of applications. Finally, this review provides some perspectives, limitations, and challenges in investigation of g-C3N4–metal-oxide-based heterojunctions.

75 citations

Journal ArticleDOI
TL;DR: The achievements broaden the way for assembling nanoporous multifunctional MOFs by employing ligand-directed synthetic strategy, which can accelerate the transformation from simple structural research to socially demanding applications.
Abstract: In terms of ligand-directed synthetic strategy, multifunctional metal–organic frameworks (MOFs) could be assembled by employing organic ligands with nitrogen-containing heterocycles, which could se...

58 citations

Journal ArticleDOI
TL;DR: In this article, a review of biochar as an electrocatalyst for microbial fuel cells is presented, highlighting the material selection, properties, and preparation of the biochar electrocatalysts, as well as the evaluation and measurement of Biochar electrodes.

58 citations

Journal ArticleDOI
TL;DR: In this paper, a novel g-C3N4/Cu2O-FeO heterogeneous nanocomposite catalyst for electrochemical CO2 reduction to CO, with a maximum Faradaic efficiency of 84.4 % at a low onset overpotential of -0.24 V vs. normal hydrogen electrode (NHE).
Abstract: To address the challenges of excessive emission of CO2, development of highly efficient electrocatalysts based on earth-abundant metals and non-metals for CO2 reduction is of great importance. Herein, we report a novel g-C3N4/Cu2O-FeO heterogeneous nanocomposite catalyst for electrochemical CO2 reduction to CO, with a maximum Faradaic efficiency of 84.4 % at a low onset overpotential of -0.24 V vs. normal hydrogen electrode (NHE). Moreover, the turnover frequency for CO2 conversion to CO reached 10300 h−1 with a high selectivity of 96.3 % at -1.60 V vs. Ag/AgCl, corresponding to a thermodynamic overpotential of -0.865 V vs. NHE. The excellent CO2 reduction to CO can be attributed to the intimate interfacial interaction between the g-C3N4 and metal oxides (Cu2O-FeO) and the higher electrochemically active surface area. Therefore, this work demonstrates the use of a g-C3N4/mixed metal oxide heterostructure as a novel and efficient nanocomposite for electrocatalytic CO2 reduction in neutral aqueous medium.

55 citations